Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina
This study covered the central agricultural region of the Chaco province, which lacks a permanent river networks. However, during the rainy period there is localized groundwater recharge. About 84 groundwater samples were taken during the period April-December 2007. These groundwater samples were co...
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todo:paper_10934529_v46_n11_p1197_Blanes2023-10-03T16:05:00Z Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina Blanes, P.S. Buchhamer, E.E. Giménez, M.C. Argentina Arsenic Chaco Central Dorsum contamination groundwater heavy metals physiochemical characteristic Argentina Chaco Central Dorsum Chemical compositions Chemical variables Contaminated groundwater Deep groundwaters Deep wells Ground water recharge High pH Low concentrations Physio-chemical River network Shallow aquifers Shallow wells Sodium bicarbonates Specific conductance Study areas Total dissolved solids World Health Organization Alkalinity Aquifers Arsenic Chlorine Contamination Electric conductivity Fluorine Groundwater resources Lead pH Sodium Sodium chloride Trace elements Wells Zinc Groundwater pollution arsenic bicarbonate ground water heavy metal sodium chloride trace element Argentina arsenic poisoning article chemical analysis electric conductivity physical chemistry water contamination water sampling Argentina Arsenic Drinking Water Environmental Monitoring Fluorides Groundwater Spectrophotometry Trace Elements Water Pollutants, Chemical Water Wells This study covered the central agricultural region of the Chaco province, which lacks a permanent river networks. However, during the rainy period there is localized groundwater recharge. About 84 groundwater samples were taken during the period April-December 2007. These groundwater samples were collected from two different depths: 62 samples from shallow wells (4 to 20 m) and 24 samples from deep wells (20 to 100 m). Chemical variables were determined: pH, specific conductance, total dissolved solid, hardness, alkalinity, HCO 3 -, CO 3 2-, SO 4 2-, Cl -, NO 3 -, NO 2 -, NH 4 +, F -, As (tot), Na +, K +, Ca 2+, Mg 2+, Fe, Cu, Ni, Pb and Zn. The chemical composition of groundwater in the study area is dominantly sodium bicarbonate and sodium chloride bicarbonate, comprising more than 60% (52/86) of shallow and deep groundwater samples. Of the 86 analyzed groundwater samples, 88% exceeded the WHO (World Health Organization) and CAA (Codigo Alimentario Argentino) standards (10 μg/L) for As (arsenic) and 9% exceeded the WHO standard (1.5 mg/L) for F -.Groundwater highly contaminated with As (max. 1,073 μg/L) and F-(max. 4.2 mg/L) was found in shallow aquifer. The contaminated groundwater is characterized by high pH (max. 8.9), alkalinity (max. HCO 3 - 1,932 mg/L), SO 4 2- (max. 11,862 mg/L), Na + (max. 3,158 mg/L), Cl - (max. 10,493 mg/L) and electric conductivity greater than 33.3 μS/cm. Other associated elements (Ni, Pb, Cu and Zn) are present in low concentrations, except for Fe that in 32% of samples exceeded the guideline value of 0.3 mg/L suggested by the CAA. Copyright © Taylor &Francis Group, LLC. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10934529_v46_n11_p1197_Blanes |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Arsenic Chaco Central Dorsum contamination groundwater heavy metals physiochemical characteristic Argentina Chaco Central Dorsum Chemical compositions Chemical variables Contaminated groundwater Deep groundwaters Deep wells Ground water recharge High pH Low concentrations Physio-chemical River network Shallow aquifers Shallow wells Sodium bicarbonates Specific conductance Study areas Total dissolved solids World Health Organization Alkalinity Aquifers Arsenic Chlorine Contamination Electric conductivity Fluorine Groundwater resources Lead pH Sodium Sodium chloride Trace elements Wells Zinc Groundwater pollution arsenic bicarbonate ground water heavy metal sodium chloride trace element Argentina arsenic poisoning article chemical analysis electric conductivity physical chemistry water contamination water sampling Argentina Arsenic Drinking Water Environmental Monitoring Fluorides Groundwater Spectrophotometry Trace Elements Water Pollutants, Chemical Water Wells |
| spellingShingle |
Argentina Arsenic Chaco Central Dorsum contamination groundwater heavy metals physiochemical characteristic Argentina Chaco Central Dorsum Chemical compositions Chemical variables Contaminated groundwater Deep groundwaters Deep wells Ground water recharge High pH Low concentrations Physio-chemical River network Shallow aquifers Shallow wells Sodium bicarbonates Specific conductance Study areas Total dissolved solids World Health Organization Alkalinity Aquifers Arsenic Chlorine Contamination Electric conductivity Fluorine Groundwater resources Lead pH Sodium Sodium chloride Trace elements Wells Zinc Groundwater pollution arsenic bicarbonate ground water heavy metal sodium chloride trace element Argentina arsenic poisoning article chemical analysis electric conductivity physical chemistry water contamination water sampling Argentina Arsenic Drinking Water Environmental Monitoring Fluorides Groundwater Spectrophotometry Trace Elements Water Pollutants, Chemical Water Wells Blanes, P.S. Buchhamer, E.E. Giménez, M.C. Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina |
| topic_facet |
Argentina Arsenic Chaco Central Dorsum contamination groundwater heavy metals physiochemical characteristic Argentina Chaco Central Dorsum Chemical compositions Chemical variables Contaminated groundwater Deep groundwaters Deep wells Ground water recharge High pH Low concentrations Physio-chemical River network Shallow aquifers Shallow wells Sodium bicarbonates Specific conductance Study areas Total dissolved solids World Health Organization Alkalinity Aquifers Arsenic Chlorine Contamination Electric conductivity Fluorine Groundwater resources Lead pH Sodium Sodium chloride Trace elements Wells Zinc Groundwater pollution arsenic bicarbonate ground water heavy metal sodium chloride trace element Argentina arsenic poisoning article chemical analysis electric conductivity physical chemistry water contamination water sampling Argentina Arsenic Drinking Water Environmental Monitoring Fluorides Groundwater Spectrophotometry Trace Elements Water Pollutants, Chemical Water Wells |
| description |
This study covered the central agricultural region of the Chaco province, which lacks a permanent river networks. However, during the rainy period there is localized groundwater recharge. About 84 groundwater samples were taken during the period April-December 2007. These groundwater samples were collected from two different depths: 62 samples from shallow wells (4 to 20 m) and 24 samples from deep wells (20 to 100 m). Chemical variables were determined: pH, specific conductance, total dissolved solid, hardness, alkalinity, HCO 3 -, CO 3 2-, SO 4 2-, Cl -, NO 3 -, NO 2 -, NH 4 +, F -, As (tot), Na +, K +, Ca 2+, Mg 2+, Fe, Cu, Ni, Pb and Zn. The chemical composition of groundwater in the study area is dominantly sodium bicarbonate and sodium chloride bicarbonate, comprising more than 60% (52/86) of shallow and deep groundwater samples. Of the 86 analyzed groundwater samples, 88% exceeded the WHO (World Health Organization) and CAA (Codigo Alimentario Argentino) standards (10 μg/L) for As (arsenic) and 9% exceeded the WHO standard (1.5 mg/L) for F -.Groundwater highly contaminated with As (max. 1,073 μg/L) and F-(max. 4.2 mg/L) was found in shallow aquifer. The contaminated groundwater is characterized by high pH (max. 8.9), alkalinity (max. HCO 3 - 1,932 mg/L), SO 4 2- (max. 11,862 mg/L), Na + (max. 3,158 mg/L), Cl - (max. 10,493 mg/L) and electric conductivity greater than 33.3 μS/cm. Other associated elements (Ni, Pb, Cu and Zn) are present in low concentrations, except for Fe that in 32% of samples exceeded the guideline value of 0.3 mg/L suggested by the CAA. Copyright © Taylor &Francis Group, LLC. |
| format |
JOUR |
| author |
Blanes, P.S. Buchhamer, E.E. Giménez, M.C. |
| author_facet |
Blanes, P.S. Buchhamer, E.E. Giménez, M.C. |
| author_sort |
Blanes, P.S. |
| title |
Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina |
| title_short |
Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina |
| title_full |
Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina |
| title_fullStr |
Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina |
| title_full_unstemmed |
Natural contamination with arsenic and other trace elements in groundwater of the Central-West region of Chaco, Argentina |
| title_sort |
natural contamination with arsenic and other trace elements in groundwater of the central-west region of chaco, argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_10934529_v46_n11_p1197_Blanes |
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